Synthesis, structure characterization and conductivity of two binuclear tungsten compounds with dmit as the ligands

By the substitution reaction of the ligand, the starting material W2S4(dtp) (2) (dtp = S2P(OC2H5)(2)(-)) reacted with (PhCO)(2)dmit (dmit= [GRAPHICS] and R4NBr (R = Et, Bu) to give two binuclear tungsten compounds (Bu4N)(2)W2 S4(dmif)(2) (I) and (Et4N)(2)W2S4(dmit)(2) (III) for the first time. Both c ompounds have been characterized by IR spectra. The C-13 NMR spectra and cr ystal structure of compound (I) are also reported. The X-ray structural ana lysis of (I) revealed S . . .S supramolecular interaction in the packing st ructure. The measurement of the temperature dependence of the electronic co nductivity shows that compound (II) possesses the semiconductor property. T he crystal data of compound (I) are: orthorhombic, Pbcn, a = 18.048 (5), b = 15.937 (5), c = 19.191 (6) Angstrom, V = 5520 (5) Angstrom (3), Z = 4, R = 0.084, Rw = 0.090.